2. (verb)function, mathematical function, single-valued function, map, mapping (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)
3. (verb)map make a map of; show or establish the features of details of "map the surface of Venus"
4. (verb)map explore or survey for the purpose of making a map "We haven't even begun to map the many galaxies that we know exist"